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Thanks to 洪志道 (Hong Zhi Dao).
This closes #466 issue on GitHub.
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This is a quick and dirty sendfile() replacement.
This closes #452 PR on GitHub.
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Using #if directives instead of #ifdef the same way as in other places.
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Buffer for application prefork request allocated from temp conf mem_pool.
If error response from main process received before buffer completion handler,
temp conf mem_pool destroyed and router may crash in completion handler.
Assertion "src/nxt_buf.c:208 assertion failed: data == b->parent" triggered
when NXT_DEBUG_ALLOC enabled in configure.
This patch disables completion handler and memory allocated for buffer
released with memory pool.
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Previously, an error during the prefork phase triggered assert:
src/nxt_port.c:27 assertion failed: port->pair[0] == -1
and resulted in exiting of the main process.
This could be easily reproduced by pushing a configuration with "rootfs",
when daemon is running without required permissions.
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Found by Coverity (CID 361277).
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This closes #441 PR on GitHub.
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After shared application port introducing, request queue in router was
removed and requests may stuck forever waiting for another process start.
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Two consecutive fd and fd2 fields replaced with array.
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The default libunit behavior relies on blocking the recv() call for port file
descriptors, which an application may override if needed. For external
applications, port file descriptors were toggled to blocking mode before the
exec() call. If the exec() call failed, descriptor remained blocked, so the
process hanged while trying to read from it.
This patch moves file descriptor mode switch inside libunit.
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The goal is to minimize the number of syscalls needed to deliver a message.
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- naive circular queue, described in the article "A Scalable, Portable, and
Memory-Efficient Lock-Free FIFO Queue" by Ruslan Nikolaev:
https://drops.dagstuhl.de/opus/volltexte/2019/11335/pdf/LIPIcs-DISC-2019-28.pdf
- circular queue, proposed by Valentin Bartenev in the "Unit router application
IPC" design draft
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Mostly harmless.
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Each application initializes a shared port with 2 file descriptors, so the test
fails because the router reaches the open files limit.
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This is a temporary solution after the 'shared port' patch. The application
process becomes idle immediately after creation. Even if it starts processing
a request (without acknowledging it yet), it is stopped by the router because
an 'out-of-idle-time' event occurs.
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Generic process-to-process shared memory exchange is no more required. Here,
it is transformed into a router-to-application pattern. The outgoing shared
memory segments collection is now the property of the application structure.
The applications connect to the router only, and the process only needs to group
the ports.
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This is the port shared between all application processes which use it to pass
requests for processing. Using it significantly simplifies the request
processing code in the router. The drawback is 2 more file descriptors per each
configured application and more complex libunit message wait/read code.
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The application process needs to request the shared memory segment from the
router instead of the latter pushing the segment before sending a request to
the application. This is required to simplify the communication between the
router and the application and to prepare the router for using the application
shared port and then the queue.
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The application process needs to request the port from the router instead of the
latter pushing the port before sending a request to the application. This is
required to simplify the communication between the router and the application
and to prepare the router to use the application shared port and then the queue.
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The goal is to minimize the number of (pid, id) to port hash lookups which
require a library mutex lock. The response port is found once per request,
while the read port is initialized at startup.
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- Changed the port management callbacks to notifications, which e. g. avoids
the need to call the libunit function
- Added context and library instance reference counts for a safer resource
release
- Added the router main port initialization
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If there are no listen sockets, the router configuration usage counter
remains 0 and never decreases. The only moment to release a configuration is
right after a configuration update.
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Earlier patch 1bf971f83571 fixes connection leakage. But connection
free requires separate remote sockaddr release.
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The gem paths must depend on the specified interpreter.
Also, gemdir looks redundant as it's already included in Gem.default_path().
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There is no reason to use printf instead of just print.
No functional changes.
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An attempt to build a Ruby module for a custom Ruby installation that has the
same major version as the system Ruby may unexpectedly cause the use of the
system Ruby library.
This closes #449 issue on GitHub.
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According to libuv documentation, uv_poll_t memory should be released
in a callback function passed to uv_close(). Otherwise, the Node.js application
process may crash at exit.
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A connection object is allocated in advance for each listen event object to be
used for the established connection. This connection needs to be freed when the
listen event is destroyed.
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The invocation parameters should be logged as well, notably the path of the file
that is failed to be created.
Also, log level changed to ALERT as it's quite critical error.
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Earlier, if nxt_mp_create() failed to allocate memory while accepting a new
connection, the resulting NULL was subsequently passed to nxt_mp_destroy(),
crashing the process.
More, if nxt_mp_create() was successful but nxt_sockaddr_cache_alloc() failed,
the connection object wasn't destroyed properly, leaving the connection counter
in an inconsistent state. Repeated, this condition lowered the connection
capacity of the process and could eventually prevent it from accepting
connections altogether.
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Since the introduction of rootfs feature, some language modules
can't be configured multiple times.
Now the configure generates a separate nxt_<module>_mounts.h for
each module compiled.
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Some PPAs for Ubuntu package PHP with versions like:
7.2.28-3+ubuntu18.04.1+deb.sury.org+1
But the script expected only "X.Y.Z".
The issue was introduced in:
http://hg.nginx.org/unit/rev/2ecb15904ba5
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There was an undefined behavior in the validation function, caused by testing
one character after the string if a wildcard was at the end.
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